Bede the Venerable — as excerpted in the Catena Aurea on Luke 6:17-19

“You will scarcely find any where that the multitudes follow our Lord to the higher places, or that a sick person is healed on a mountain; but having quenched the fever of lust and lit the torch of knowledge, each man approaches by degrees to the height of the virtues. But the multitudes which were able to touch the Lord are healed by the virtue of that touch, as formerly the leper is cleansed when our Lord touched him. The touch of the Saviour then is the work of salvation, whom to touch is to believe on Him, to be touched is to be healed by His precious gifts.”